Medical skin preparation knife

Abstract

The invention discloses a medical skin preparation knife, relates to the technical field of medical instruments, and aims to solve the technical problems that an existing skin preparation knife is single in function and mostly adopts a non-integrated operation process, so that the limitation is large, and the application range is small. The medical skin preparation knife comprises a handle, the top of the handle is fixedly communicated with a shaving shell, and a shaving mechanism is movably arranged in the shaving shell; the shaving mechanism comprises a shaving support and an extrusion assembly. Shaving supports are arranged in the shaving shell in an annular array mode, and the extrusion assembly is fixedly arranged in the handle. By means of the shaving mechanism, the medical skin preparation knife combines the functions of shaving, lubricating liquid smearing, shaving length adjusting and the like, multiple functions are integrated, compared with the prior art, the medical skin preparation knife has wide applicability and high efficiency, the multiple functions are integrated, multiple requirements can be met, comprehensive benefits are improved, resource waste is reduced, cost is reduced, and the medical skin preparation knife is worthy of popularization and application. The operation process is simplified, and the use efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and more particularly to a medical skin preparation knife. Background Art

[0002] Medical dermatomes are indispensable tools in modern surgical operations and are widely used in various types of surgeries, including general surgery, orthopedics, urology, plastic surgery and other surgeries in the preoperative preparation stage. Their quality and use effect are directly related to the safety and smooth progress of the operation. Medical dermatomes are a medical device specially used for preoperative preparation of surgical operations. Their main function is to shave the hair in the surgical area so that the skin can be better disinfected during surgery and the risk of postoperative wound infection can be reduced. At the same time, it provides a clear field of view for surgical operations and reduces the interference of hair on the operation.

[0003] Currently, when using a medical skin preparation knife to shave a patient's hair, a lubricant is generally applied to the shaved area before shaving the hair with the skin preparation knife. However, this operation adopts a non-integrated process, and each step is carried out relatively independently without interfering with each other, resulting in the existing skin preparation knife having a relatively single function, great limitations, and a small scope of application. In view of this, we propose a medical skin preparation knife. Summary of the invention

[0004] The purpose of the present invention is to provide a medical skin preparation knife to solve the technical problems that the existing skin preparation knives have relatively single functions and mostly adopt non-integrated operation processes, resulting in great limitations and a small scope of application.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a medical skin preparation knife, comprising a handle, the top of the handle is fixedly connected to a shaving shell, and a shaving mechanism is movably arranged inside the shaving shell; The shaving mechanism comprises a shaving support and an extrusion assembly; the shaving support is arranged in a circular array inside the shaving shell, and the extrusion assembly is fixed inside the handle; Two adjacent shaving brackets are symmetrically connected through a connecting piece, and the inner walls on both sides of each shaving bracket are movably connected to two shaving plates through a first plug rod, and one of the first plug rods passes through the right end plate on the shaving bracket, and the two adjacent shaving plates are symmetrically connected through a plurality of hinged plates, wherein one side of the three shaving brackets is commonly fixedly connected to a connecting frame, the connecting frame is fixedly connected to a transmission cylinder on the side away from the shaving bracket, and the transmission cylinder is movably sleeved on the inner wall of the left end plate on the shaving bracket, the inner wall of the left end plate is fixedly connected to a plurality of ratchets in an annular array, and the inner walls on both sides of the transmission cylinder are movably connected to a plurality of pawls in an annular array through a first latch, and the pawls are meshed with the ratchets. Then, one side of each of the ratchet claws is symmetrically structured and fixedly connected with two first springs, and each of the two first springs is fixedly connected to the side surface of the transmission cylinder, the right end plate of the shaving shell is movably provided with an adjustment component close to the side of the shaving bracket, the right end plate of the shaving bracket is movably provided with a locking unit, and the interior of the shaving shell is movably provided with a coating unit. The present invention combines the functions of shaving, applying lubricating fluid, and adjusting the shaving length with a medical skin preparation knife through a shaving mechanism to achieve multifunctional integration. Compared with the prior art, the present invention has wide applicability and high efficiency, and integrates multiple functions to achieve integration, which can meet multiple needs, improve comprehensive benefits, reduce resource waste, reduce costs, simplify the operation process, and improve usage efficiency.

[0006] Preferably, slide bars are fixedly connected to the inner walls of both sides of each shaving bracket, and a blade is fixedly connected to one side of each shaving plate.

[0007] Preferably, the adjustment assembly includes a plurality of adjusting wheels, each of which is fixedly connected to an end of the first plug rod away from the shaving bracket, and the right end plate on the shaving shell is movably connected to an adjusting disk near the shaving bracket through the second plug rod, and the adjusting disk is provided with a plurality of slide grooves in a ring array on the side close to the shaving bracket, and the inner wall of one side of each slide groove is symmetrically structured and fixedly connected with two first telescopic rods, and the side surface of each first telescopic rod is movably sleeved with a second spring, and an adjusting rod is slidably connected inside each slide groove, and the output ends of each two first telescopic rods are respectively movably contacted with the end surface of the adjusting rod, and the side surfaces of the plurality of adjusting wheels are respectively fixedly sleeved with a plurality of limiting rings, and the end surface of each limiting ring is fixedly connected with two metal ropes, and each two metal ropes are movably connected to the adjusting rod through a movable ring, and the movable ring is movably sleeved on the side surface of the adjusting rod.

[0008] Preferably, each of the side surfaces of the adjusting wheel is fixedly connected with a plurality of plug-ins in an annular array, and the inner wall of each of the limiting rings is provided with a plurality of slots in an annular array, and the plug-ins are plugged into the slots. Preferably, the locking unit includes a locking rod, which is movably sleeved in the hole on the right end plate, and a third spring is movably sleeved on the side surface of the locking rod, and both ends of the third spring are fixedly connected between two fixing plates on the locking rod, and one of the fixing plates is fixedly connected to the side of the right end plate away from the adjusting disk, and a plurality of sockets are opened on one side of the adjusting disk in a circular array, and the locking rod is inserted into the sockets.

[0009] Preferably, the coating unit includes two spiral grooves, which are symmetrically arranged on the inner wall of the shaving shell. Each side surface of the sliding rod is movably sleeved with a fourth spring, and both ends of each fourth spring are respectively fixedly connected with sliding balls, and every two sliding balls are movably sleeved on the side surface of the sliding rod, and each sliding ball is slidably connected inside the spiral groove.

[0010] Preferably, a fixed rod is fixedly sleeved inside the right end portion, and two augers are fixedly sleeved on the side surface of the fixed rod in a symmetrical structure. The present invention compresses the fourth spring by sliding the sliding ball inside the spiral groove, so that the lubricating liquid remaining on the inner wall of the shaving shell can be removed and applied to the hair, thereby saving the lubricating liquid. The lubricating liquid in the cylindrical shape of the shaving bracket flows to both sides through the two augers, so that the lubricating liquid is evenly applied, realizing an efficient application function, which is beneficial to improving the use efficiency of the device.

[0011] Preferably, a notch is provided on the side surface of the handle, and a rubber sleeve is fixedly sleeved on the end surface of the handle.

[0012] Preferably, the extrusion assembly includes a storage cylinder, which is fixedly sleeved inside the handle, a push plate is movably sleeved inside the handle, and the push plate is movably contacted with the bottom of the storage cylinder, a push rod is fixedly connected to the bottom of the push plate, a push block is fixedly connected to the bottom of the push rod, and the push block is slidably connected to the inner wall of one side of the slot, a fifth spring is movably sleeved on the side surface of the push rod, and the fifth spring is fixedly connected to the top of the push block.

[0013] Preferably, the top of the storage cylinder is fixedly connected with a flow head, and the flow head is arranged on the inner wall of the top of the handle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention combines the functions of shaving, applying lubricating fluid and adjusting the shaved length with the medical skin preparation knife through the shaving mechanism to achieve multifunctional integration. Compared with the prior art, the present invention has wide applicability and high efficiency, and integrates multiple functions to achieve integration, which can meet multiple needs, improve comprehensive benefits, reduce resource waste, reduce costs, simplify the operation process, and improve use efficiency.

[0015] 2. The present invention compresses the fourth spring by sliding the sliding ball inside the spiral groove, so that the lubricating liquid remaining on the inner wall of the shaving shell can be removed and applied to the hair, saving the lubricating liquid. The lubricating liquid in the cylindrical shape of the shaving bracket flows to both sides through two augers, so that the lubricating liquid is evenly applied, realizing an efficient application function, which is beneficial to improving the use efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A is an enlarged structural diagram; Figure 3 is a three-dimensional structural schematic diagram of the present invention, to illustrate the three-dimensional structure of the extrusion assembly; Figure 4 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in FIG. Figure 6 It is a three-dimensional enlarged structural schematic diagram of the extrusion assembly of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in FIG. Figure 8 It is a schematic diagram of a three-dimensional partial structure of the present invention, to show the three-dimensional structure inside the shaving shell; Fig. 9 It is a three-dimensional partial enlarged structural schematic diagram of the shaving mechanism of the present invention, to illustrate the three-dimensional structure of the shaving plate angle adjustment; Fig.10 For the present invention Fig. 9 The enlarged structural diagram at D in FIG. Fig.11 It is a three-dimensional partial enlarged structural schematic diagram of the locking unit of the present invention; Fig.12 It is a schematic cross-sectional view of the overall structure of the present invention, to illustrate the structure of the adjustment component in use state; Fig.13 For the present invention Fig.12 The enlarged structural diagram at E in FIG. Fig.14 The figure is a schematic cross-sectional view of the shaving plate structure of the present invention, to illustrate the application and use state.

[0017] Explanation of reference numerals in the figure: 1. handle; 101. shaving shell; 102. notch; 103. rubber sleeve; 2. shaving mechanism; 201. shaving support; 201a. slide bar; 202. connecting piece; 203. shaving plate; 203a. blade; 204. hinge plate; 205. connecting frame; 206. transmission cylinder; 207. ratchet; 208. ratchet pawl; 209. first spring; 3. extrusion assembly; 301. storage cylinder; 301a. circulation head; 302. push plate; 303. push rod; 304. push block; 305. Fifth spring; 4. Adjustment assembly; 401. Adjustment wheel; 401a. Insert block; 402. Adjustment disk; 403. Slide groove; 404. First telescopic rod; 405. Second spring; 406. Adjustment rod; 407. Limiting ring; 407a. Slot; 408. Metal rope; 409. Movable ring; 5. Locking unit; 501. Locking rod; 502. Third spring; 503. Socket; 6. Even coating unit; 601. Spiral groove; 602. Fourth spring; 603. Sliding ball; 604. Fixing rod; 605. Auger. DETAILED DESCRIPTION

[0018] like Figure 2 , Figure 7 and Fig.10 As shown, the present invention relates to a medical skin preparation knife, comprising a handle 1, a shaving shell 101 is fixedly connected to the top of the handle 1, and a shaving mechanism 2 is movably arranged inside the shaving shell 101; The shaving mechanism 2 includes a shaving support 201 and an extrusion assembly 3; the shaving support 201 is arranged in a circular array inside the shaving housing 101, and the extrusion assembly 3 is fixed inside the handle 1; Two adjacent shaving brackets 201 are symmetrically connected through a connecting piece 202, and the inner walls of both sides of each shaving bracket 201 are movably connected to two shaving plates 203 through a first plug rod, and one of the first plug rods passes through the right end plate of the shaving bracket 201. The two adjacent shaving plates 203 are symmetrically connected through a plurality of hinge plates 204, wherein one side of the three shaving brackets 201 is commonly fixedly connected to a connecting frame 205, and the connecting frame 205 is fixedly connected to a driving cylinder 206 on the side away from the shaving bracket 201, and the driving cylinder 206 is movably sleeved on the shaving bracket. The inner wall of the left end plate on the frame 201 is fixedly connected with a plurality of ratchets 207 in an annular array, and the inner walls on both sides of the transmission cylinder 206 are connected with a plurality of ratchets 208 in an annular array through a first latch, and the ratchets 208 are meshed with the ratchets 207. It is worth noting that by setting the ratchets 208 and the ratchets 207, when the medical skin preparation knife is used, the handle 1 is pulled downward, and the plurality of shaving brackets 201 cannot rotate through the one-way rotation structure, and the patient's body hair is shaved through the shaving plate 203. When the handle 1 is pushed, the plurality of shaving brackets 201 are 01 is rotated, and the lubricant is applied to the skin at the desired hair-shaving position through the extrusion component 3. Compared with the conventional skin preparation knife in the prior art, the device can achieve the functions of shaving hair and applying lubricant, and has a simple operation process. One side of each ratchet 208 is symmetrically structured and fixedly connected with two first springs 209, and each of the two first springs 209 is fixedly connected to the side surface of the transmission cylinder 206. The right end plate of the shaving shell 101 is close to the side of the shaving bracket 201 and the right end plate of the shaving bracket 201 is movably provided with an adjustment component 4. The right end plate of the shaving bracket 201 is movably provided with a locking unit 5. A coating unit 6 is movably provided inside the shell 101, a slide bar 201a is fixedly connected to the inner walls on both sides of each shaving bracket 201, and a blade 203a is fixedly connected to one side of each shaving plate 203. The present invention combines the functions of shaving, applying lubricating fluid, and adjusting the shaving length with the medical skin preparation knife through the shaving mechanism 2 to achieve multi-functional integration. Compared with the prior art, the present invention has wide applicability and high efficiency, and integrates multiple functions to achieve integration, which can meet multiple needs, improve comprehensive benefits, reduce resource waste, reduce costs, simplify the operation process, and improve utilization efficiency.

[0019] In an embodiment of the present invention, Figure 5 , Figure 7 and Fig.13As shown, the adjustment assembly 4 includes a plurality of adjustment wheels 401, each of which is fixedly connected to the end of the first plug rod away from the shaving bracket 201, and the right end plate on the shaving housing 101 is movably connected to the shaving bracket 201 through the second plug rod. The adjustment disk 402 is provided with a plurality of slide grooves 403 in a circular array on the side close to the shaving bracket 201. The inner wall of one side of each slide groove 403 is symmetrically structured and fixedly connected with two first telescopic rods 404. The side surface of each first telescopic rod 404 is movably sleeved with a second spring 405. The inner wall of each slide groove 403 is symmetrically structured and fixedly connected with two first telescopic rods 404 ... An adjusting rod 406 is slidably connected, and the output ends of each of the two first telescopic rods 404 are respectively in active contact with the end surface of the adjusting rod 406. A plurality of limiting rings 407 are respectively fixedly sleeved on the side surfaces of the plurality of adjusting wheels 401. Two metal ropes 408 are fixedly connected to the end surface of each limiting ring 407. Each of the two metal ropes 408 is movably connected to the adjusting rod 406 through a movable ring 409, and the movable ring 409 is movably sleeved on the side surface of the adjusting rod 406. It is worth noting that the angle of the shaving plate 203 can be adjusted by rotating the adjusting disk 402 clockwise and counterclockwise. , and then adjust the direction of the blade on the blade 203a to adjust the length of the shaved hair. The side surface of each adjusting wheel 401 is in a circular array and fixedly connected with a plurality of plug blocks 401a. The inner wall of each limiting ring 407 is in a circular array and has a plurality of slots 407a, and the plug blocks 401a are plugged into the slots 407a. The present invention rotates the adjusting disk 402, and the metal rope 408 applies a force to the limiting ring 407, driving the adjusting wheel 401 to rotate, and then driving the shaving plate 203 to rotate, so as to adjust the shaved length, which is conducive to improving the use effect of the device. When in use, first rotate the adjusting disk 402, the adjusting rod 406 moves to one side inside the slide groove 403, the adjusting rod 406 drives the movable ring 409 to move, and pulls the limiting ring 407 through the metal rope 408, so that the limiting ring 407 rotates, and the plug block 401a is inserted into the slot 407a, so that the adjusting wheel 401 rotates, and the rotation of the adjusting wheel 401 drives the shaving plate 203 to rotate, so that the shaving plate 203 is tilted, and then the direction of the blade on the blade 203a is changed, so that the blade 203a is adjusted, and the shaved hair length is adjusted.

[0020] In an embodiment of the present invention, Fig.11 and Fig.13As shown, the locking unit 5 includes a locking rod 501, which is movably sleeved in the hole on the right end plate, and a third spring 502 is movably sleeved on the side surface of the locking rod 501, and the two ends of the third spring 502 are fixedly connected between two fixing plates on the locking rod 501, and one of the fixing plates is fixedly connected to the side of the right end plate away from the adjustment disk 402, and a plurality of sockets 503 are opened in a circular array on one side of the adjustment disk 402, and the locking rod 501 is inserted into the inside of the socket 503. It is worth noting that by locking The rod 501 is inserted into one of the insertion holes 503 to limit the rotation of the adjustment disk 402, so as to prevent the shaving plate 203 from encountering resistance during the shaving process, causing the adjustment disk 402 to rotate, and causing the shaving plate 203 to tilt at an angle, which may easily cause skin scratches. After the adjustment is completed, the third spring 502 applies a force to the locking rod 501, so that the locking rod 501 is inserted into the insertion hole 503 to fix the adjustment disk 402, and then the handle 1 is pulled downward to move the body hair.

[0021] As another embodiment of the present invention, Figure 7 , Figure 8 and Fig. 9As shown, the coating unit 6 includes two spiral grooves 601, and the two spiral grooves 601 are symmetrically arranged on the inner wall of the shaving shell 101. The side surface of each slide bar 201a is movably sleeved with a fourth spring 602, and both ends of each fourth spring 602 are respectively fixedly connected with a sliding ball 603, and every two sliding balls 603 are movably sleeved on the side surface of the slide bar 201a. It is worth noting that by providing the spiral grooves 601, the sliding balls 603 slide inside the spiral grooves 601, so that the two sliding balls 603 are gathered toward the middle to compress the fourth spring 602. At this time, The residual lubricating liquid on the inner wall of the shaving shell 101 can be taken out and applied to the human hair to avoid the lubricating liquid remaining inside the shaving shell 101 and causing waste of lubricating liquid. Each sliding ball 603 is slidably connected inside the spiral groove 601, and a fixed rod 604 is fixedly sleeved inside the right end. The side surface of the fixed rod 604 is a symmetrical structure and is fixedly sleeved with two augers 605. It is worth noting that the two augers 605 are symmetrical in structure. During the rotation of the plurality of shaving brackets 201, the lubricating liquid inside the plurality of shaving brackets 201 flows to both sides through the two augers 605. The present invention realizes efficient lubricant application. The sliding ball 603 slides inside the spiral groove 601 to compress the fourth spring 602, so that the lubricant remaining on the inner wall of the shaving housing 101 can be removed and applied to the hair, saving the lubricant. The lubricant in the cylindrical shaving bracket 201 is made to flow to both sides through the two augers 605, so that the lubricant is evenly applied, realizing efficient application function, which is conducive to improving the use efficiency of the device. The lubricant flows out from the circulation head 301a, and part of the lubricant is shoveled into a plurality of shaving brackets 201 through the adjacent shaving plates 203. The second shaving frame 201 is provided with a plurality of shaving brackets 201, and the second shaving bracket 201 is provided with a plurality of shaving brackets 201. The shaving bracket 201 is provided with a plurality of shaving brackets 201, and the ...

[0022] As another embodiment of the present invention, Figure 1 and Figure 3 As shown, a groove 102 is provided on the side surface of the handle 1, and a rubber sleeve 103 is fixedly sleeved on the end surface of the handle 1. It is worth noting that by arranging the rubber sleeve 103 on the handle 1, during use, by arranging an anti-slip component on the handle 1, compared with conventional instruments in the prior art, the instrument increases friction and improves the gripping feel, thereby preventing hand slippage.

[0023] As another embodiment of the present invention, Figure 6As shown, the extrusion assembly 3 includes a storage cartridge 301, and the storage cartridge 301 is fixedly sleeved inside the handle 1. It is worth noting that in use, the lubricating liquid in the storage cartridge 301 is squeezed out, and the lubricating liquid is applied to the hair through the shaving mechanism 2. Compared with the prior art, there is no need to manually apply the lubricating liquid, and the operation is more convenient. A push plate 302 is movably sleeved inside the handle 1, and the push plate 302 is movably contacted with the bottom of the storage cartridge 301, a push rod 303 is fixedly connected to the bottom of the push plate 302, a push block 304 is fixedly connected to the bottom of the push rod 303, and the push block 304 is slidably connected to the inner wall of one side of the slot 102, a fifth spring 305 is movably sleeved on the side surface of the push rod 303, and the fifth spring 305 is fixedly connected to the top of the push block 304, and the top of the storage cartridge 301 A circulation head 301a is fixedly connected and arranged on the inner wall at the top of the handle 1. When applying lubricating liquid, the blade 203a is firstly fitted with the shaving bracket 201 by rotating the adjusting disk 402 to hide the blade 203a. Then, the pushing block 304 is pushed to make the pushing plate 302 exert force on the storage cylinder 301. After the storage cylinder 301 is compressed, the lubricating liquid therein flows from the circulation head 301a into the interior of the shaving shell 101. At the same time, the handle 1 is pushed to make the cylinder composed of several shaving brackets 201 roll on the hair through the unidirectional rotating structure. At this time, the cylinder composed of the shaving brackets 201 rotates clockwise, and the adjusting wheel 401 pulls the adjusting rod 406 through the metal rope 408 to make the blade 203a always fit on one side of the shaving bracket 201. Fig.12 shown.

[0024] Working principle: This embodiment provides a medical skin preparation knife. When in use, the adjustment disk 402 is first rotated, and the adjustment rod 406 moves to one side inside the slide groove 403. The adjustment rod 406 drives the movable ring 409 to move, and pulls the limit ring 407 through the metal rope 408, so that the limit ring 407 rotates, and the plug block 401a is inserted into the slot 407a, so that the adjustment wheel 401 rotates, and the rotation of the adjustment wheel 401 drives the shaving plate 203 to rotate, so that the shaving plate 203 is tilted, and then the direction of the blade on the blade 203a is changed, so that the blade 203a is adjusted, and the shaved hair length is adjusted. After the adjustment is completed, the third spring 502 applies a force to the locking rod 501, so that the locking rod 501 is inserted into the socket 503, and the adjustment is The disc 402 is fixed, and then the handle 1 is pulled downward to shave the body hair. When applying the lubricant, the blade 203a is first fitted with the shaving bracket 201 by rotating the adjusting disc 402 to hide the blade 203a, and then the push block 304 is pushed to make the push plate 302 apply force to the storage cylinder 301. After the storage cylinder 301 is compressed, the lubricant in it flows from the circulation head 301a into the shaving shell 101. At the same time, the handle 1 is pushed to make the cylinder composed of several shaving brackets 201 roll on the hair through the unidirectional rotating structure. At this time, the cylinder composed of the shaving brackets 201 rotates clockwise, and the adjusting wheel 401 pulls the adjusting rod 406 through the metal rope 408 to make the blade 203a always fit on one side of the shaving bracket 201. Fig.12 As shown, the lubricating liquid flows out from the circulation head 301a, and part of the lubricating liquid is shoveled into the cylinder composed of the plurality of shaving brackets 201 through the adjacent shaving plates 203, and cooperates with the two augers 605 to make the lubricating liquid flow to both sides to apply to the hair. At the same time, during the rotation of the cylinder composed of the plurality of shaving brackets 201, the two sliding balls 603 slide into the interior of the shaving shell 101 through the spiral groove 601, and the two sliding balls 603 gather toward the middle to compress the fourth spring 602, so that part of the lubricating liquid remaining on the inner wall of the shaving shell 101 is stained on the compressed fourth spring 602. When the two sliding balls 603 move out of the shaving shell 101, the fourth spring 602 pops out to both sides and applies to the hair.

[0025] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A medical skin preparation knife, characterized in that: It comprises a handle (1), the top of the handle (1) being fixedly connected to a shaving shell (101), and a shaving mechanism (2) being movably arranged inside the shaving shell (101); The shaving mechanism (2) comprises a shaving support (201) and an extrusion assembly (3); the shaving support (201) is arranged in a circular array inside the shaving shell (101), and the extrusion assembly (3) is fixed inside the handle (1); Two adjacent shaving brackets (201) are symmetrically connected via a connecting piece (202), and the inner walls on both sides of each shaving bracket (201) are movably connected to two shaving plates (203) via a first plug rod, and one of the first plug rods passes through the right end plate on the shaving bracket (201). Two adjacent shaving plates (203) are symmetrically connected via a plurality of hinge plates (204), wherein one side of the three shaving brackets (201) is commonly fixedly connected to a connecting frame (205), and the side of the connecting frame (205) away from the shaving bracket (201) is fixedly connected to a transmission cylinder (206), and the transmission cylinder (206) is movably sleeved on the inner wall of the left end plate on the shaving bracket (201). The inner wall of the left end plate is in the form of a ring array and is fixedly connected to a plurality of ratchets (207); the inner walls on both sides of the transmission cylinder (206) are in the form of a ring array and are movably connected to a plurality of pawls (208) via first latches; the pawls (208) are meshedly connected to the ratchets (207); one side of each pawl (208) is symmetrically fixedly connected to two first springs (209); and each of the two first springs (209) is fixedly connected to the side surface of the transmission cylinder (206); an adjustment component (4) is movably provided on the side of the right end plate of the shaving shell (101) close to the shaving bracket (201); a locking unit (5) is movably provided on the right end plate of the shaving bracket (201); and a coating unit (6) is movably provided inside the shaving shell (101).

2. A medical skin preparation knife according to claim 1, characterized in that: The inner walls on both sides of each shaving bracket (201) are fixedly connected to sliding rods (201a), and one side of each shaving plate (203) is fixedly connected to a cutting edge (203a).

3. A medical skin preparation knife according to claim 2, characterized in that: The adjustment assembly (4) comprises a plurality of adjustment wheels (401), each of the adjustment wheels (401) being fixedly connected to an end of a first plug rod away from the shaving support (201), an adjustment disk (402) being movably connected to the right end plate of the shaving housing (101) near the shaving support (201) via a second plug rod, a plurality of slide grooves (403) being provided in a circular array on a side of the adjustment disk (402) near the shaving support (201), the inner wall of one side of each slide groove (403) being symmetrically fixedly connected to two first telescopic rods (404), and a movable sleeve on the side surface of each first telescopic rod (404) A second spring (405) is connected, an adjusting rod (406) is slidably connected inside each of the slide grooves (403), and the output ends of each of the two first telescopic rods (404) are respectively in active contact with the end surface of the adjusting rod (406), and the side surfaces of the plurality of adjusting wheels (401) are respectively fixedly sleeved with a plurality of limiting rings (407), and the end surface of each limiting ring (407) is fixedly connected with two metal ropes (408), and each of the two metal ropes (408) is movably connected to the adjusting rod (406) through a movable ring (409), and the movable ring (409) is movably sleeved on the side surface of the adjusting rod (406).

4. A medical skin preparation knife according to claim 3, characterized in that: The side surface of each adjusting wheel (401) is fixedly connected with a plurality of plug blocks (401a) in a circular array, and the inner wall of each limiting ring (407) is provided with a plurality of slots (407a) in a circular array, and the plug blocks (401a) are plugged into the inside of the slots (407a).

5. A medical skin preparation knife according to claim 4, characterized in that: The locking unit (5) comprises a locking rod (501), the locking rod (501) being movably sleeved in a hole on the right end plate, a third spring (502) being movably sleeved on a side surface of the locking rod (501), and two ends of the third spring (502) being fixedly connected between two fixing plates on the locking rod (501), and one of the fixing plates being fixedly connected to a side of the right end plate away from the adjustment disk (402), a plurality of insertion holes (503) being provided in a circular array on one side of the adjustment disk (402), and the locking rod (501) being inserted into the inside of the insertion holes (503).

6. A medical skin preparation knife according to claim 5, characterized in that: The coating unit (6) comprises two spiral grooves (601), the two spiral grooves (601) are symmetrically arranged on the inner wall of the shaving shell (101), the side surface of each slide rod (201a) is movably sleeved with a fourth spring (602), both ends of each fourth spring (602) are respectively fixedly connected with a sliding ball (603), and each two sliding balls (603) are movably sleeved on the side surface of the slide rod (201a), and each sliding ball (603) is slidably connected inside the spiral groove (601).

7. A medical skin preparation knife according to claim 6, characterized in that: A fixing rod (604) is fixedly sleeved inside the right end portion, and the side surface of the fixing rod (604) is symmetrically structured and fixedly sleeved with two augers (605).

8. The medical skin preparation knife according to claim 7, characterized in that: A notch (102) is provided on the side surface of the handle (1), and a rubber sleeve (103) is fixedly sleeved on the end surface of the handle (1).

9. The medical skin preparation knife according to claim 8, characterized in that: The extrusion assembly (3) comprises a storage cylinder (301), the storage cylinder (301) is fixedly sleeved inside the handle (1), a push plate (302) is movably sleeved inside the handle (1), and the push plate (302) is in movably contact with the bottom of the storage cylinder (301), a push rod (303) is fixedly connected to the bottom of the push plate (302), a push block (304) is fixedly connected to the bottom of the push rod (303), and the push block (304) is slidably connected to the inner wall of one side of the notch (102), and a fifth spring (305) is movably sleeved on the side surface of the push rod (303), and the fifth spring (305) is fixedly connected to the top of the push block (304).

10. The medical skin preparation knife according to claim 9, characterized in that: The top of the storage cylinder (301) is fixedly connected to a circulation head (301a), and the circulation head (301a) is arranged on the inner wall of the top of the handle (1).

Images